Sani Solar Sanitation

Sani Solar Sanitation

SANI SOLAR has been developed for the decentralized use in rural areas of warm and dry regions. The innovative concept allows a mass reduction by drying and a stabilization of feces, taking advantage of the climatic conditions. In comparison with conventional on-site sanitation systems, SANI SOLAR reduces the amount of feces from about (1,320 LB) 600 kg per person and year to about (36 LB) 25 kg, of which some (20 LB) 9 kg can be used as a valuable and hygienically safe fertilizer.

Where to use SANI SOLAR?

Our system is suitable as decentralized sanitation facility for all rural areas with warm arid or semi-arid climate. For best performance SANI SOLAR requires:

  • Low humidity
  • Intensive solar radiation
  • High evapotranspiration rate

How does it work?

At the moment of use, urine and feces are automatically separated by the urine-diverting user interface. Feces fall into one of four containers, which are installed, on a turntable located in the drying chamber located below the toilet seat. Before leaving the toilet cabin, the user positions another container by moving the turntable with the help of the lever, placed in the cabin.  The feces in the containers are quickly dried and stabilized by the combination of directional airflow and solar radiation in the drying chamber.

Considering daily use by 5 persons, the 4 fecal containers should be emptied every 5-month only. This measure can be realized easily and hygienically safe by one single person without any special equipment.  The disposal of the dried and stabilized residue does not generate a negative environmental impact. The urine is conducted out of the cabin into the external drying unit where it is converted into a stable, high-quality plant fertilizer.  This fertilizer is recovered by the user with the help of a spatula.


Environmentally friendly: The unique SANI SOLAR system is not a conventional dry or waterless toilet because it solves the sanitation problem beyond a hygienic usage up to the treatment and sanitization of the residues. SANI SOLAR works without water and electric energy, reducing residues to a minimum. Furthermore, it generates a hygienic fertilizer which is easy to handle and applicate.

Sociocultural: Tests and surveys confirmed the excellent acceptance by women and men of any age. User feedback examples: Isabel states, “It is cooler in the toilet than outside” | Francisco asserts, “No odors”

Technologically: SANI SOLAR is sustainable due to its robust and durable technology.  This singular drying toilet was specially designed to resist over a long period under the extreme climatic conditions characteristic for arid and semi-arid regions. SANI SOLAR can be operated and cleaned by its users. There is no need for maintenance.
Due to the Plug &Play concept, up to three units of SANI SOLAR can be installed by a team of two persons.

Hygienic: There still exist a large number of locations where the human right for access to improved sanitation facilities cannot be guaranteed. Health hazards caused by germs and parasites are the consequences of such circumstances which mostly affect children living in rural areas.
SANI SOLAR provides a hygienic and humane solution to improve the sanitary situation in rural areas, not only regarding the use but also regarding the safe disposal of the residues.

Financially: Sustainable also means that a complete sanitary solution does not generate operational costs nor requires external service regarding maintenance or disposal of residues.


Please contact us directly for further details and specifications.